Question

我有一项任务，我希望并行运行500次，如果我想只运行一次我会做这样的事情

Executors.newSingleThreadScheduledExecutor().scheduleWithFixedDelay(
            taskProvider.get(),
            0,
            100,
            TimeUnit.MILLISECONDS
        );

我想运行500个任务（高IO），我从任务提供程序以固定速率并行运行，有没有办法在不创建500个执行程序或在while循环中提交500个任务的情况下执行此操作？

编辑：我知道我可以创建一个大小为500的线程池，如果我这样做，我将不得不提交500个任务（？）来并行运行它们，我看是否有办法在不提交的情况下执行它类似的任务，因为基本上他们有相同的内容，我也不想同时启动所有这些，我想每100毫秒开始50。

Answer 1

您必须手动执行此操作：

void submitTaskChunks(int chunkCount, int chunkSize, long delayMillis) throws InterruptedException {
    ExecutorService executorService = Executors.newCachedThreadPool();

    for (int i = 0; i < chunkCount; i++) {
        List<Callable<Void>> taskChunk = IntStream.range(0, chunkSize)
                .mapToObj(k -> taskProvider.get())
                .collect(Collectors.toList());

        executorService.invokeAll(taskChunk);
        Thread.sleep(delayMillis);
    }

    executorService.shutdown();
    executorService.awaitTermination(1, TimeUnit.MINUTES);
}

每100毫秒提交50次任务10次： submitTaskChunks(10, 50, 100); 请注意，taskProvider.get应返回Callable<Void>。

Answer 2

您可以创建大小为500的任务列表并使用

<%@ Application Language="C#" %>
<script runat="server">

    void Application_Start(object sender, EventArgs e) 
    {
        jobscheduler.Start();
        // Code that runs on application startup
    }

    void Application_End(object sender, EventArgs e) 
    {
        //  Code that runs on application shutdown
    }

    void Application_Error(object sender, EventArgs e) 
    { 
        // Code that runs when an unhandled error occurs
    }

    void Session_Start(object sender, EventArgs e) 
    {
        // Code that runs when a new session is started
    }

    void Session_End(object sender, EventArgs e) 
    {
        // Code that runs when a session ends. 
        // Note: The Session_End event is raised only when the sessionstate mode
        // is set to InProc in the Web.config file. If session mode is set to StateServer 
        // or SQLServer, the event is not raised.
    }
</script>

安排相同的任务500次

2 个答案: